Set 1 answers

1. The road is black and rough, while the cement is grey and smooth. Dull black surface absorb heat faster than bright shiny surface. Thus, the snow on the road melt sooner than on the cement.
2. The material with higher emissivities glows the brightest.
3. If the fireplace pokers are made of copper, we cannot hold on to it, because it is too hot. Copper conducts heat faster than iron.
4. One would find it in cold climates. Air is a poor conductor of heat, thus the air-filled tubes are able to trap heat better, especially useful in cold climates.
5. Snow insulates the ground and traps the heat within the ground , so that the water pipes would not freeze.